Firstly: Nice port of RT; actually much nicer.
Now to business: ART (1.9.3) seems to enter a “Not Responding” state (from which it eventually recovers) twice (during the functions I’ve used, anyway).
State one is at launch. After taking what seems like a long time for the main window to appear, the “Not Responding” title comes up and lasts about a minute until the photos in the current folder appear (maybe 15 photos).
State two is when clicking the “Save” disk icon; no response for maybe a minute until the “Save…” dialog appears.
Running the latest W10 Home on an LG Gram with 8GB, SSD, and an i5-8265U. If anyone needs more info, let me know. Thanks.